Furnace.



PTENTED MAR. 22, 1904.

W. 'SUMMERS PURNAGB. PrLIoATIoN FILED Ars. zo, 190s.

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PATENTED MAR. 22, 19041 W. SUMMERS.

FURNACB APPLICATION FILED APB.. 20, 1903.

2 SHEETS-SHEET 2.

NO IODEL.

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UNITED 'STATES Patented March 22, 1904.

PATENT OEEICE.

FURNACE.

SPECIFICATION forming part of Letters Patent N0. 75 5,186, dated March 22, 1904.

Application filed April 20, 1903. Serial No. 153,470. (No model.)

cation.

The object of my invention is to provide means for so perfecting the combustion of fuel and fuel-gases in furnaces as to prevent the formation of black smoke and effect a saving in fuel consumption. This and such other objects as may hereinafter appear are attained by the devices shown in the accompanying drawings, in which* Figure 1 is a sectional view on the line l 1 of Fig. 3 looking in the direction indicated by the arrows. Fig. 2 is an enlarged plan view of the upper end of one of my improved blowers. Fig. 3 is a longitudinal sectional view on the line 3 3 of Fig. 1 looking in the direc,

tion indicated by the arrows, and Fig. 4 is a sectional detail on the line 4 4 of Figs. 1 and 3 looking in the direction indicatedV by the arrows.

Like letters of reference indicate the same parts in the several figures of the drawings.

Referring by letter to the accompanying drawings, A indicates the boiler-casing; B, the fire-tubes; C, the uptake; D, the fire-box; E, the iiameway; F, the ash-pit; G, the feed-door; H, the door to the ash-pit, and I the stack.

Fitted to the feed-door is a deflecting-plate J, arranged opposite to the air or draft openings K in the feed-door. This deflectingplate is pivoted to the feed-door merely for convenience in opening and closing the door, as its normal operative position would ordinarily prevent the closing of the door. Where, as shown in the drawings, the feed-opening is provided with double doors, each door is provided with a defiecting-plate, as shown.

The deflecting-plate may be conveniently held in operative position by an arm L, preferably pivoted thereto.

In applying my invention to aboiler already in use I t `the stack with one or more petticoat-pipes M, as the case may be, and fit a bushingm around these petticoat-pipes M, so that the passage of smoke, &c., through the main stack and around the petticoat-pipes M is prevented by the bushing N.

Below the petticoat pipe or pipes M, I arrange a blower O, as shown, each petticoatpipe being provided with its own blower, which is adjusted as to size and distance from the petticoat-pipe in accordance with well-understood principles in this art. I have found, however, that the combustion of the fuel is facilitated by so constructing the blower as to produce a gyrating or cyclonic current within the petticoat-pipes. To accomplish this, I construct my blower as shown more in detail in Fig. As will be seen, the upper end of the pipe or upright of the blower is bent substantially into a circle, and a series of perforations is made in the upper face of this circular portion of the blower. The result is'that the steam at highest pressure emerges from the rst perforation, and the pressure of the jet emerging from the other perforations is successively less. Consequently the mass of steam, which as a whole emerges from the blower, forms a rotating or gyrating current. This result I have found in practice to be necessary for the most effective operation of my furnace as a whole in preventing the formation of black smoke and in so promoting the combustion of the fuel as to effect a saving of upward of thirty per cent. of fuel consumed.

It will of course be understood that my invention may be applied in various manners other than the manner shown in the drawings. This is especially true as to the location of the draft-openings and the deflecting-plate. only necessary, in my experience, to provide suihcient draft-openings above the bed of fire on the grate and to so arrange the deflecting-plate that the current ofair entering through the draft-openings will be directed downwardly against the re on the grate.

In the operation of my device. it is found* that the smoke and gases roll upwardly from the grate toward the crown-sheet and then down again, and by means of this rolling action the black smoke is either not formed or, if formed, is consumed mostly or entirely in the {ire-box, so that nothing but clear flame issues from the {ire-tubes into the uptake. At

It is IOO the same time this perfected combustion necessarily results in a saving of fuel required to produce a given amount of steam per square foot of grate-surface.

I claiml. The combination with the front of a furnace provided with draft-openings, of a deecting-plate arranged to direct the draft' downwardly against the grate and ablower arranged adjacent to the stack, said blower being provided with a substantially circular horizontal portion closed at one end and provided with a series of steam-ports in its upper face, substantially as described.

2. The combination with the front of a furnace provided with draft-openings, of a deieoting-plate arranged to direct the draft down- WILLIAM SUMMERS.

Witnesses:

M. E. SHIELDS, F. H. DRURY. 

